Method and System for the Flexible Definition of Graphic Information on Communication Terminals

1. A method for flexible definition of graphic information for a display on an output unit of a communication terminal controlled by a PBX communication device, the method comprising: defining a first display area on the output unit for presenting subscriber information, for which the content is fixed by the PBX communication device and/or the communication terminal; defining a second display area on the output unit; storing graphic information for the second display area in the PBX communication device, wherein the graphic information is configurable; transmitting the information from the PBX communication device to the communication terminal; displaying the graphic information in the second display area; and wherein access to the contents of the second display area is blocked for a subscriber of the communication terminal.

2. The method according to claim 1 , wherein the communication terminal is a stationary communication terminal connected to the PBX communication device by an ISDN communications link, and digital instructions for display of the graphic information on the communication terminal are transmitted in the transmitting step from the PBX communication device to the communications terminal via an ISDN type D signaling channel.

3. The method according to claim 2 , wherein the dimensions of the first and second display area overlap partly or completely and change depending on call processing states.

4. The method according to claim 2 , wherein contents of the second display area are displayed in accordance with a priority control system.

5. The method according to claim 2 , wherein the graphic information is buffered for the second display area in a memory unit assigned to the communication terminal.

6. The method according to claim 2 , wherein the graphic information for the second display area is transmitted over a data channel carrying signaling information.

7. The method according to claim 2 , wherein the graphic information for the second display area is presented as an animated sequence.

8. The method according to claim 2 , wherein a number of communication terminals are controlled jointly in the same way by the communication device.

9. The method according to claim 1 , wherein the dimensions of the first and second display area overlap partly or completely and change depending on call processing states.

10. The method according to claim 9 , wherein contents of the second display area are displayed in accordance with a priority control system.

11. The method according to claim 9 , wherein the graphic information is buffered for the second display area in a memory unit assigned to the communication terminal.

12. The method according to claim 1 , wherein contents of the second display area are displayed in accordance with a priority control system.

13. The method according to claim 1 , wherein the graphic information is buffered for the second display area in a memory unit assigned to the communication terminal.

14. The method according to claim 1 , wherein the graphic information for the second display area is transmitted over a data channel carrying signaling information.

15. The method according to claim 1 , wherein the graphic information for the second display area is presented as an animated sequence.

16. The method according to claim 1 , wherein a number of communication terminals are controlled jointly in the same way by the communication device.

17. The method according to claim 1 , wherein the method is performed by a computer program running on a processor unit operatively adapted to the communication device.

18. The method according to claim 1 , wherein a computer program product comprises program code to perform the method.

19. A communication system for flexible definition of graphic information for an output on an output unit assigned to a communication terminal, the system comprising: a PBX communication device for storing the graphic information and for transmitting digital instructions for display thereof via an ISDN D signaling channel to the communication terminal; a first display area defined at the output unit for displaying subscriber information, for which the contents is fixed by the PBX communication device and/or the communication terminal; and a second display area defined at the output unit for displaying the graphic information which can be set on the PBX communication device and transferred to the communication terminal for display; and wherein access to the contents of the second display area is blocked for a subscriber of the communication terminal.